Need to fix Aprillia RX50 by tonight or can't get to work!!

efdnthr · L Plate Warrior Joined: 26 Oct 2010 Karma :

Hi there, need to fix my Aprilia RX 50's running problems ASAP!! It's deresricted and will reach 50/55 mph, but I´ve been having trouble with it. It completely dies at about 40mph / when throttle is pulled back completely. Will only start again with choke and will only pull away with revs just below max. Took carb off - will give it a clean, but is there anything else obvious it could be before I re-assemble it and find out it´s still having the same problem? Electrics maybe? Would really appreciate some help please!!

N cee thirty · Banned Joined: 31 Jan 2010 Karma :

is the clutch adjusted properly ?
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

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efdnthr · L Plate Warrior Joined: 26 Oct 2010 Karma :

not sure, how would i check?

efdnthr · L Plate Warrior Joined: 26 Oct 2010 Karma :

not sure, how would i check?

efdnthr · L Plate Warrior Joined: 26 Oct 2010 Karma :

sorry, didn't mean to post that twice, pressed the wrong button Razz

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I have an Aprilia RX 50, can't wait to get something that doesn't die up hill!! Hahhaa Razz

d3akiin · L Plate Warrior Joined: 29 Oct 2010 Karma :

im having the exactly the same problem my bikes a 09 plate need help Sad

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m.d.deakin

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

N cee thirty · Banned Joined: 31 Jan 2010 Karma :

d3akiin · L Plate Warrior Joined: 29 Oct 2010 Karma :

do you know why this is.. also when i turn the handle bars after it ticks over it cuts it off!
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m.d.deakin

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

I can't see a poorly adjusted clutch doing the symptoms listed. At speed a poorly adjusted clutch will only slip or not engage fully.
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chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

d3akiin · L Plate Warrior Joined: 29 Oct 2010 Karma :

i just dont understand how it cuts out when you fully rev it Sad

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m.d.deakin

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

d3akiin · L Plate Warrior Joined: 29 Oct 2010 Karma :

its all completely standard exept it has a mallosi air filter on it.. i have just brought a new metrakit exhaust for it and it was de restricted by a proper motoring shop.
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m.d.deakin

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

d3akiin · L Plate Warrior Joined: 29 Oct 2010 Karma :

It is like a k and n air filter but its spongey if you know what I mean also my other problem is my clocks my milage shows 999999 my speedo don't work nor my revs how would I fix this is ther a reset button?
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m.d.deakin

JD-234 · Derestricted Danger Joined: 29 Aug 2010 Karma :

have you rejetted the carb after putting the airfilter on, put the standard one back on

pits · World Chat Champion Joined: 22 Apr 2008 Karma :

Your power rave valve is more than likely fooked, and I can tell you that there is no stock of Aprilia power rave valves in the UK, you can get one from Italy, but they are all on holiday or something.

Identical problem to my RS125, and my RS125 has had
New bottom end
New top end
New carb
New air filter and service (standard filter)
In fact the only thing left to replace is the power rave valve, but just can't get hold a new one for love nor money, not buying a second hand one for near as dammit the same price as a new one.

K&N and new exhaust would have required up jetting the carb.

Your best bet is to get it to a garage and get it properly checked over, the short of it though, you aint going anywhere on it, it will become totally unrideable.

d3akiin · L Plate Warrior Joined: 29 Oct 2010 Karma :

the rx 50 2009 model does not have a power valve it has a reed valve.
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m.d.deakin

pits · World Chat Champion Joined: 22 Apr 2008 Karma :

The reed valve does the same job as the rave valve does it not? If it does then the symptoms are identical to a failing rave valve.

Either way, I would get it to a garage to have a look at, the Aprilias are to finicky to mess about with unless you know what you are doing, easily mess that up and it can quickly cost you a lot of money

Syris the Indomitable · Crazy Courier Joined: 22 Oct 2010 Karma :

d3akiin · L Plate Warrior Joined: 29 Oct 2010 Karma :

i have just looked at the carb it has a 10.2 jet in it.. and it has a mallosi air filter on it, also i have just ordered a new metrakit full exhaust for it i thought maybe its getting too much fuel beacuse the jet is so much bigger?
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m.d.deakin

Codemonkey · Crazy Courier Joined: 18 Oct 2009 Karma :

Sounds to me more like it might be running lean (this is a very bad thing). Could be overheating as you work the engine harder, causing it to die. Try fitting the original more restrictive air filter back on and see if that makes any difference.

*(My experience is with model aircraft 2 stroke engines, so I could be talking rubbish).